package com.admin.controller;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.util.List;
import java.util.Random;

import javax.imageio.ImageIO;

import com.admin.model.Sys_User;
import com.admin.util.Constants;
import com.admin.util.MD5;
import com.jfinal.core.Controller;


public class LoginController extends Controller{
	public void index(){
		this.render("/jsp/login/login.jsp");
	}
	// 登录
	public void doLogin(){
		try {
			String user = this.getPara("loginName");
			String pwd = this.getPara("passWord");
			String code = this.getPara("code");
			if(null != user && null != pwd && code != null){
				List<Sys_User> list = Sys_User.dao.query(new String[]{"loginname='"+user+"'"});
				if(null == list || list.size() <= 0){
					setAttr("name_error","用户"+user+"不存在");
				}else{
					list = Sys_User.dao.query(new String[]{"loginname='"+user+"'","password='"+ MD5.encode(pwd) +"'"});
					if(null == list || list.size() <= 0){
						setAttr("pass_error","密码错误");
					}else if(!code.equals(getSessionAttr("code"))){
						setAttr("code_error","验证码错误");
					}else if(list.get(0).get("active").toString().equals("0")){
						setAttr("name_error","用户"+user+"不可用");
					}else{
						setSessionAttr(Constants.LOGIN_USER,list.get(0));
						// 修改登录时间和次数
						Sys_User.dao.updateLoginInfo(list.get(0).getLong("id"));
						redirect("/main");
						return;
					}
				}
				forwardAction("/");
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	/**
	 * 生成验证码
	 * 
	 * @param response
	 * @param session
	 */
	public void createValidate(){
		getResponse().setHeader("Pragma", "No-cache");
		getResponse().setHeader("Cache-Control", "no-cache");
		getResponse().setDateHeader("Expires", 0);
		getResponse().reset();
		int width = 60, height = 20;
		BufferedImage image = new BufferedImage(width, height,
				BufferedImage.TYPE_INT_RGB);
		Graphics g = image.getGraphics();
		Random random = new Random();
		g.setColor(getRandColor(200, 250));
		g.fillRect(0, 0, width, height);
		g.setFont(new Font("Times New Roman", Font.PLAIN, 18));
		g.setColor(new Color(255, 255, 255));
		g.drawRect(0, 0, width - 1, height - 1);
		g.setColor(getRandColor(160, 200));
		for (int i = 0; i < 155; i++) {
			int x = random.nextInt(width);
			int y = random.nextInt(height);
			int xl = random.nextInt(12);
			int yl = random.nextInt(12);
			g.drawLine(x, y, x + xl, y + yl);
		}
		String sRand = "";
		for (int i = 0; i < 4; i++) {
			String rand = String.valueOf(random.nextInt(10));
			sRand = sRand + rand;
			g.setColor(new Color(20 + random.nextInt(110), 20 + random
					.nextInt(110), 20 + random.nextInt(110)));
			g.drawString(rand, 13 * i + 6, 16);
		}
		setSessionAttr("code",sRand);
		g.dispose();
		try {
			ImageIO.write(image, "JPEG", getResponse().getOutputStream());

		} catch (Exception e) {
			e.printStackTrace();
		}
		renderNull();
	}
	
	Color getRandColor(int fc, int bc) {
		Random random = new Random();
		if (fc > 255)
			fc = 255;
		if (bc > 255)
			bc = 255;
		int r = fc + random.nextInt(bc - fc);
		int g = fc + random.nextInt(bc - fc);
		int b = fc + random.nextInt(bc - fc);
		return new Color(r, g, b);
	}
	
	// 注销登录
	public void exit(){
		getSession().removeAttribute(Constants.LOGIN_USER);
		redirect("/");
	}
}
